Actors Jennifer Aniston and Justin Theroux are "stronger than ever" after their New Year vacation in Mexico which allowed them to relax and spend time with each other.

The couple were away from each other towards the end of the last year due to their work commitments so their trip to Cabo San Lucas, Mexico gave them a chance to put their romance back on track, reports contactmusic.com.

"They're stronger than ever and the connection they had in Cabo is proof. The vacation was just what they needed, relaxation and lots of laughs. Jen and Justin make each other smile and everyone commented on how much they're back on form. They're in a really good place," said a source.

The couple got engaged on Theroux's 41st birthday in August 2012.